V4l2 subdev ioctl problem

[854053437]

Hi, Jerry

@JerryChang

since the latest rel-32 release version is r32.7.5, is it possible for moving forward to confirm this issue?

We are not considering upgrading L4T version for now because it works fine in other board.

And there is no lt6911uxe to developer kit board to test it right now too, so I’ll do something more in our board.

Thanks!

[JerryChang]

hello 854053437,

BTW, subdev ioctl can be implemented under tegracam_v4l2.c, which is very generic to all sensors.

[854053437]

Hi, Jerry
I changed the driver init function and problem solved.
In my nano board, I used device_initcall_sync and I changed it into late_initcall_sync. And there is no issuse with video function.
just like I said in this floor, it’s about the subdev bound order

@854053437

I add debug message, and it seems nvcsi is bounded as the same time as our driver device

[    3.923404] tegra194-isp5 14800000.isp: initialized
[    3.930096] tegra194-vi5 15c10000.vi: using default number of vi channels, 36
[    3.932798] tegra194-vi5 15c10000.vi: initialized
[    3.937230] subdev bound init
[    3.937293] tegra194-vi5 15c10000.vi: subdev uih,lt6911uxe 8-002b bound
[    3.937323] tegra194-vi5 15c10000.vi: subdev 15a00000.nvcsi--1 bound

And I tried module insmod, it’s the same that only process subdev bound once

[    3.459151] tegra194-vi5 15c10000.vi: using default number of vi channels, 36
[    3.463440] tegra194-vi5 15c10000.vi: initialized
[    3.468188] subdev bound init
[    3.468273] tegra194-vi5 15c10000.vi: subdev 15a00000.nvcsi--1 bound
......
[  213.079563] lt6911uxe: loading out-of-tree module taints kernel.
[  213.081036] uih,lt6911uxe 8-002b: lt6911uxe_probe 1844: struct i2c_driver.probe
[  213.515400] uih,lt6911uxe 8-002b: check chipid ok, id:0x221
[  213.518553] tegra194-vi5 15c10000.vi: subdev uih,lt6911uxe 8-002b bound

Thanks for help!